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Finding the Fourth Proportional to 19,318.46, 28,960.95 and 7,480.49

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Solution

The fourth proportional to 19,318.46, 28,960.95 and 7,480.49 is: 11,214.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318.46 : 28,960.95 = 7,480.49 : x
  2. Step 2: Convert to fraction form
    19,318.46/28,960.95 = 7,480.49/x
  3. Step 3: Cross multiply
    19,318.46x = 28,960.95 × 7,480.49
  4. Step 4: Simplify right side
    19,318.46x = 216,642,096.87
  5. Step 5: Solve for x
    x = 216,642,096.87/19,318.46
  6. Step 6: Final answer
    x = 11,214.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.